I would not worry too much about this. The impact of making a post in a thread is small.
In
Service Announcements, I've seen obvious scams almost reach the top of the list after a few people post in it (as a warning).
As a test, I've bumped
this topic on page 4. After my post, it was the 6th topic on the first page. I've removed my post again, it takes a bit longer to drop it down again.
Update: 10 minutes later it's back on page 4.
Well I don't think a thread temporarily being on the first page is going to hurt anything. If a service is an obvious scam, people warning about the service is going to make their potential victims have an easier time seeing the warnings. Similarly, if a service is not a scam per se, but is having problems, having a thread on the first page might alert potential customers of the problems if people are warning about the problems.