Before editing, be sure to read the wiki's policies. Please sign your name on Talk and vote pages using four tildes (~~~~) to automatically produce your name and the current date. Be sure to verify your e-mail address in your preferences. Before attempting any major article rewrites please read the layout guide. If you have any questions, check out the policy and help pages (see here for editing help), add a question to the Community portal, view the forum or ask me on my talk page. Again, welcome!
With reference to your question, a † symbol is used exactly as you said. It means the character is deceased and is very often used in infoboxes.
Also, please could you remember to sign any messages you leave on talk pages by using four tildes (~) or by using the signature button.
Thanks,Joeworthy 19:42, July 21, 2010 (UTC)
I personally cannot do anything about vandals other than revert their edits. You need to take info like this to an admin User:Nick O'Demus, User:Seth Cooper, User:Starstuff. --JKoch(Owl Me!) 05:25, July 23, 2010 (UTC)
Thanks for contributing to the Harry Potter Wiki! Please note, we use British spelling, syntax, and grammar on this Wiki (e.g. "defence" instead of "defense", and "practise" instead of "practice" when it is a verb). We use British titles as well (e.g. "Philosopher's Stone" instead of "Sorcerer's Stone", and "Minister for Magic" instead of "Minister of Magic"). If you have any further questions, feel free to ask. Thanks. --JKoch(Owl Me!) 14:58, July 25, 2010 (UTC)