Holding todays sellers personally responsible for the events of the past doesn’t seem to intelligent to me. As a realtor who represents many buyers looking to get the best deal possible right now, I would never submit an offer in the manner that you proposed. It reeks of insincerity and of a high probability that even if the seller and buyer do get into escrow, that the buyer will eventually back out. Thus by accepting it, the seller would lose market time because they would not be active on the market during the escrow period, however short it may be.
There are much more effective ways to present aggressive offers that not only will save you the buyer money, but will also portray your sincere interest in the home you really want to buy.
If you look at the majority of homes that have not sold over this past year, most of them have received an offer or two, yet they were simply not accepted. I strongly fault the sellers for this behavior but to each his own. However your line of reasoning that this multiple offer strategy will enhance the probability of getting what you want in my opinion is incorrect.
Buying a home is a major decision that involves AT LEAST several hundreds of thousands of dollars. If you really would go through with a purchase of “any one of a few homes” that you submitted multiple offers on, then I guess that is your choice.
Personally, I advice my clients to only put an offer on a home they really love. I have definitely talked more people OUT of making offers then into making offers.