If they are trying to farm trust then yeah that is bad... But..

1. A lot of BTC users don't know much if anything bout how a mempool works, how the fee market really works, what a TX accelerator actually does.. etc..
2. If you can watch the blockchain and pounce on the via accelerator as soon as VIA finds a block then you can get in in maybe the first 1 minute.. The accelerator that actually works, VIA, is hard to get into and takes a lot of time watching to use it at the right moment.. So it's not work free by any means..

3. What's wrong with 1 post accounts using accelerators? You think they might be throwaways used just for that purpose as to not link a TX to a user account? To be anon.. Isn't this pretty much the reason BTCT allows multiple accounts?

If they are abusing it for trust then sure shut em down but if they are simply providing a service in the exchange for tips then why?
If they get tips then they are obviously providing value and if not they will give up..