It is always important to have good personal/computer security and pay attention to the type and scope of free WiFi. Using free WiFi in an airport, for example, is probably not a good idea. My computer, phone, and camera all have the ability to provide their own hotspot and I use one of those now, instead of free WiFi if I am not sure of how "friendly" where I am is. Too, my husband has a couple of computers, one of which is for travelling and doesn't have anything sensitive on it. I have coded my passwords and "hidden" the file and only I know the key to the code, even if the file were found. Other than that, I do not have anything on my computer that would bother me were the computer stolen or compromised.

I think it is always safe to come to PC since we do not use our names and it is very public/searchable by Google, etc. anyway, no matter where one is coming on from. A lot of people without computers have come here from public library computers, work, etc. I don't think PC and what computer/WiFi one uses matters. However, if someone with access to your computer and computer's history wants to know where you go, that might be different. Even then, though, unless they can guess your nickname or your posts are frequent/have extremely identifiable stories (such as mine :-) I think it would be difficult for someone to "spy" on one.