Well, it was bound to happen as I follow airdrops. The form looked good, the "secure" was GREEN and the data on the form seemed authentic. But, it was a scam airdrop requesting ETH donations for bonuses. Money gone, not a lot, but lesson learned.
Question- Can anyone get into my MEW with just my MEW ER20 wallet address? No private key disclosed, of course. Did provide, the usual twitter, telegram profile info. Should I worry about any other potential issues?
You're asking if someone can get into your MyEtherWallet with just your public adress? I wouldn't hope so, because that would mean that anyone that has access to a block explorer could get everyone's funds.
Should I worry about any other potential issues?
If that's the only thing that you gave them, your adress, then there isn't too much to worry about. You might receive some spam email ( if they're selling their userbase..). If you connected your twitter through an api ( gave them permission to do or see X, you should remove that. )
https://help.twitter.com/en/managing-your-account/connect-or-revoke-access-to-third-party-apps