Looking at the post histories of some of the complainants here I get a feeling that Hellfish is doing a great job.
OP hasn't even bothered to provide an example of a deleted post.
That also happens to me. I have made posts more than 30 to to rank up as Jr Member. When I check my account, my posts were deleted and my rank go back to newbie. I have to make and work on my posts to rank up again as Jr Member. My effort and time were wasted. I hope the moderators wont take personally the opinion of others. It has a great impact for users with bounty campaigns.
It's much worse than that. You wasted the time of everyone reading or skipping over or reporting or deleting your garbage posts. Having your posts deleted should have been a clear hint that they're garbage. I bet they were similar to this brilliant piece of investment advice on page 13 of a thread already full of the same crap:
Investing in real estate is a good choice because real estate do not depreciate in value. You can buy lot at a cheaper price and sell it for higher price. You can also build an apartment and have it rented. It has a sure profit and gain. No lose on this type of investment.