It really depends on that service for which you're using HTTP bot and how much you're using it, so we can't tell for all services whether you'll end banned or not, but someone who is experienced enough could tell individually for the each in their config threads where you and others may ask. And since I'm not into that kind of things, for FeelingSurf you should wait for dbzdivik to come and answer you if someone else doesn't do that in the meantime.
swper it depends upon site if site is too popular and working great it will ban you asap if you run HTTP Bot for maximum Time. But if you use bot wisely and hide your self partially or fully there will be less chance of getting ban. As for FeelingSurf i'm running exe for past 1 week continuously
With that popular sites, you certainly take a risk by using HTTP bots. You should always split bot usage to more than one account and with different proxy for the each, so you would have backup if some of them gets banned, and also you reduce the chance of being caught.