A single mistake made months earlier can haunt you.
Lonelypussy recorded webcam show - Popular usernames for dating sites
performs a broader sweep of services for usernames only, immediately flagging services where a particular username has been registered.
This is an easy way for someone with malicious intent to draw connections between a dating site profile username and your ‘real’ life, even if your profiles are correctly private or hidden.
(The use of photo editing tools also becomes blatantly obvious, which can be a cause for some embarrassment.) Ensure you remove identifying metadata from photos before posting them onto your dating profile.
If I were forced to pick only one error which causes dating site members the most personal embarrassment over the long term, it’s forgetting this.
I highly recommend reading this eye-opening blog on the subject by IOActive.