The TL;DR summary:
- it is not a crime to answer SE questions (unless you deliberately pose as a lawyer, which is fraud).
- good basic questions will point out potential legal landmines to other developers.
- knowing where the potential landmines are, will allow other devs to design their games so as to avoid them.
The long version - First, regarding risk: I read your practicing law without a license, and it specifically says:
some of the commonly occurring
activities that generally are not
considered the practice of law in
- internet discussions groups without further personalized assistance in
preparation of documents or court
So we're fairly safe from prosecution by the Oregon DA. :)
Second, at least for those of us in the US, we have the First Amendent, which says we can speak freely - including answering legal questions. Granted if you claim to be a lawyer you'll get in trouble, but that's why people include the IANAL.
Now, as to whether we (gamedev) should be either answering, or asking legal questions - I think it's question-specific. Some questions will be too technical, and require a lawyer - but some questions, don't require any major legal knowledge.
You don't need a medical degree to tell someone that aspirin can cause Reye's syndrome in children, and you don't need a law degree to tell someone that copyright violation (of music) is illegal.
If someone asks such a basic legal question, that can be answered by quoting any of dozens of current copyright websites, I don't see a problem with the question. Assuming it's game-related, of course. :)
As the legal question gets more complex, it obviously falls more out of our domain (and gets too person-specific anyway), so it would be an off-topic question.
Where do you draw the line? That's something we're still trying to answer for a lot of topics :) But I don't think the answer is zero - I think some legal (game-related) question can be valid and on-topic for this site.
As to whether any given legal question would be useful to others, I think they could be - even if only to inform other devs that there is a legal issue that they need address, before releasing their game (and maybe before writing the game they can fix the issue beforehand).