Regex is tough but you can get tons of mileage with basic filters.
1) Click Options on the top right of the screen which pops up a window
2) Click Filters on the bottom of the navigation pane
3) Select Comment from the drop down
4) Enter the string you want to filter.
It will filter exactly what you enter in there. Unfortunately "stop" is not the same as "Stop" or "sTop". But there is an easy way around that if this is a problem.
Pro-tip: You can enclose multiple tokens in brackets and it will do either such as:
[Dd][Oo]][Gg]
This will filter dog, Dog, dOg, doG etc etc
I will reply to this post with my filter list to give you an idea but I won't be able to see the post because ya know. Each needs to be pasted in individually.