everyone can see your rank. personally it doesn't matter too much though. people ranked knowledgeable or higher can change your rank. but don't bug them to do so, or if you're not already ranked fluffy, you probably will be. not saying they're abusing their power, one aspect associated with fluffies is arrogance and ignorance, and bugging them will make you seem that way.
posting spells that won't work or telling people about spells that won't work on forums then arguing they'll work also will get you ranked that. as well as missus of area's in the site, like improper chat or forum conduct.
asking a fluffy question though, won't get you ranked that, example, 'can i become a vampire?' that's fine. but arguing and demanding people believe you are one and a spell did it, will get you ranked fluffy.
if you're so concerned about ranks and avoiding being a fluffy, there's a very simple step you can take; research. everyone has questions about things, and it's fine to ask, but look for books on the subject, if you find an author, look them up, see if they're reputable, because anything 'new age' can be published, because there's no way of factualizing, or checking accuracy for most, so you need to keep your wits about you.