i visit my grandmother about twice a month, and I also browse MMO-C on my phone from time to time. if I was able to report people without logging in, it would do it from those 2 places as well. I can see how other posters, and lurkers without accounts, would do the same. i don't think it would really cause any bad side effects, apart from people who spam reports, and you can build something like "no more than 20 reports per hour". If you need to report someone every 3 minutes, you're creating as much spam as the people you report.