[Pharo-project] When is a freeze a bug or me fiddling too much

Hi all, I have spend some time fiddling with Pharo, wonderful! I have always had a tendency to redefine vital methods in ST, and sometimes that kills it (typically it just hangs). Pharo seems a little more prone to that than what I was used to. In particular, I seem to have a tendency to spot methods where inserting a "self halt" will cause the pre-debugger to open a new pre-debugger to open a new pre-debugger to.... My question is - are there any guidelines on when I should just live with it, or if it is a bug? Would there be anyone interested in me collecting a list of the things that I stumble upon that make the image freeze? Best, Kasper