Re: Networking follow up...months later
1. No, there's no drawback. Nothing to lose, everything to gain. "You may not remember meeting me at SIGGRAPH but I just wanted to say hi. Will be graduating in [month] [year] and will be stepping up the netwoking. I enjoyed meeting you and hope to run into you again..."
2. One time. Maybe two. More than that is only OK if they write back.
3. Maybe you can't, or maybe you can say "hey did you see this YouTube video about the guy who wants to become a world-famous designer" and include the link. Or share an industry news tidbit he might not have heard about. Or just say "wow, how about Zynga going IPO, must be nice, huh?"* and share an article link.
*(Already outdated news item by way of example)
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