This is generally the same on Docs and Word. You'd just highlight the table, go into the settings, and expand it by one column, on docs by dragging it out a little more on the given grid.
Hope this helps!
I'd go with yes, but are you doing something malicious or just being nosey?
D. DoS. DoS is a way to potentially lag or even crash different types of servers ranging from as small as a simple website to bigger websites and video games servers.