While it is true that in the past it did allow you get into full worlds and hop faster, they did remove that feature when asked to by Jagex and they always try to comply with Jagex's wishes for things like this. And the client was not hacked, it's site was. But at one point Tip.it's site was hacked as well, does that mean you will stop trusting Tip.it from that point on? If you don't wish to use Swiftkit, noone is forcing you.