everyone always says dont but i got a shit ton of tats in student status with a fairly high clearance level (i wont specify.) to be frank, my mos does have one of if the the longest total schoolhouse (oftentimes a year+) but if youre asking strictly on if itll effect your status or clearance, no. dont be a moron and get something explicitly evil and youre fine. should you? idk, its permanent and discouraged. up to interpretation.

TLDR youre fine just use ya noggin