Don't take it personally. I wasn't talking about Deism more so than the epistle the Peter wrote. He mentioned the flood. When I mentioned Deism, I was thinking about the founding fathers of America (and Thomas Jefferson specifically), not you.
This second epistle, beloved, I now write unto you; in [both] which I stir up your pure minds by way of remembrance: That ye may be mindful of the words which were spoken before by the holy prophets, and of the commandment of us the apostles of the Lord and Saviour:
Knowing this first, that there shall come in the last days scoffers, walking after their own lusts, And saying, Where is the promise of his coming? for since the fathers fell asleep,
all things continue as [they were]
from the beginning of the creation. For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water: Whereby the world that then was, being overflowed with water, perished: But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men. - (2Pe 3:1-7 KJV)
As far as I know, Barbarian, you don't fit the bill, but you know better than I do. The point is the point, Peter didn't mention Deism but from what he did say, they would fit the bill. Peter was talking about the day of Judgment and telling us that there would be some who would come who were willingly (purposefully) ignorant of the biblical flood and the fact that God has (and will) act to judge mankind -- they comforted themselves by pretending that the world (and they themselves) was nowhere close to being judged. The Holy Spirit, through Peter, urges us to not be like them and to consider what kind of life we should lead, since we know what will soon happen.
Actually, Deists don't fully fit the bill either because in the previous chapter he described the ones he spoke more fully - He said they were "false teachers" who denied that the Lord bought them. He said they would make merchandise of you, that they walk after the flesh, despise government(s) and can not cease from sin.
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Still, those things that are characteristic of those "reserved for destruction," whose "judgment does not linger," and whose "damnation does not slumber," are the very things that Peter says we should be aware of and shun. He spoke of damnable heresies and false teachers. He spoke of what "teachings" or heresies we were to be familiar with. The epistle was very specific when it mentioned the flood and the conclusion that the world (not just a localized region or an allegorical world) would be judged.
To answer your question (and give my opinion) I would think that if somebody thought the flood was allegorical but accepted the conclusion of the Word of God in 2Peter -- that person would strive to lead a life of holiness and this would be considered by his/her Father in Heaven. Stil, we are urged to "be teachers few" because they receive greater condemnation (judgment). If I were in that position, I think it would be prudent to keep my personal belief to myself and not try to teach others.
My brethren, be not many masters [teachers], knowing that we shall receive the greater condemnation. - (Jam 3:1 KJV)