[adt2bt]

He'll just cut the stream<->robinhood connection, there's nothing from robinhood on down that will save his $25k.

[stockstream]

Actually, there kind of is. It will stop you from placing trades if you daytrade with less than that. Your account will be suspended.

https://support.robinhood.com/hc/en-us/articles/217072366-Pa...

[dragonwriter]

Stopping you from trading on the account doesn't protect the value in the account (and makes it harder for you to take action that would protect it, too!)

[abofh]

Typically you're forbidden from increasing your equity loan on a margin call - closes are completely fine (So you can buy shorts, or sell longs, but the inverse is against the rules). I've never used robinhood, but I've been declared a PDT before.