EDIT: now i look back on this, I cringe. Dont judge... When people say on mod applications, when they're a wellknown member or experienced or just a member, and they say "Be more active" I just think: THEY ARE ACTIVE, THAT IS WHY THEY ARE ACTIVE MEMBERS!!!! AHHHHHHHHHHHHHH
Actually, active member and those other ranks don't necessarily mean you're active, it just means you have a lot of trophy points. You could've been an Experienced member but left the forums a year ago, and when you come back you immediately make a moderator application. They haven't been active that year, right?
You were active for a time to get those Titles but like @Reborn said you could leave and come back, you wouldn't be considered active in that case.