you can do that with &&'s and ||'s for many pages if you need to depending on your program! I can't say if it's good or bad, sometimes it must be done.
I believe so! I'm not quite an expert on orthodox coding practices, but I have neither seen nor heard of any problems resulting from short chains of these. Possibly if the chains are too long and have no newlines in them, there could be a readability issue, but if you find a balance I don't think there will be any problems.
Also make sure no code within the || or && expressions has side effects, because with respect to those side effects they will act like conditionals. This is a side effect of the short-circuit evaluation of the expressions.