I'm going to assume (pretend?) that the OP wasn't trying to be funny, and answer it seriously.
1. I agree with this almost completely. As a side note, though, the statement "We're here to learn black-letter law" is not the best attitude. The sooner you can get past this, at least in 1L, the better.
2. Generally good advice, if that is an option. At our school, some professors allow this, some allow a limited number of them, some only allow them if you give them a note before class (and allow only a limited number), and some don't allow it at all. So - if it's an option, good advice, if not, then pretty useless. Better advice is just be prepared.
3. Comments, yes. Questions, generally yes, but if you have a decent sense for it, you can ask in a way that the class finds informative and helpful. I generally save mine for after if I can, but sometimes a question just has to be asked at the time, or it will be too hard to explain later. Do it quickly, concisely, and rarely.
4. A good rule. Some professors ask for personal experiences.
The first 5. The comment on age is inconsistent with my law school experience, but the advice is good advice. John Galt thinks arguing with professors is the most interesting part. I would wager that John Galt's classmates think seeing John Galt get embarrassed is the most interesting part of class. I would further wager (along with LawJockey07) that, as interesting as they find it, most of John Galt's classmates would strongly prefer that he shut the eff up already.
The second 5. Again, a good rule of thumb, but a rule that can be broken if you have a good sense of it. (If you're thinking about this comment or my comment on #3, and wondering if you have a good sense of it, you probably don't. If you're not wondering, you still probably don't.)
6. Like most of these rules, this one can probably be broken now and then. But seriously, if you're asking questions or making comments in order to impress anybody, then shut the eff up, for real. You're doing nobody any favors by trying to impress people, least of all yourself, who are quickly becoming a laughing stock. I'm 100% with the OP on this.
7. Your grade will probably be inversely proportional to your use of AIM in class. Grades, especially 1L grades, are of paramount importance. Using these two statements, you can decide whether it makes more sense to use AIM to make fun of your fellow students, or to just make fun of them the old fashioned way, after class.
8. Uh, whatever.
If I were to add one more, it would be:
10. If you don't know who the gunner/laughingstock/most obnoxious person in class is, it's you.