* https://mobile.reuters.com/article/amp/idUKKCN2253T2 * https://mobile.reuters.com/article/amp/idUSKBN1FT2S4
Robinhood was in a no-win situation. You can read about why they were forced to restrict buying here: https://www.cnbc.com/2021/02/01/elon-musk-on-clubhouse-robin...
If they restricted sells too, they would have been lambasted, likely even more than they currently are, by people trying to get out of their positions either to capture gains or avoid loss.
Robinhood's only move was to mitigate the fall-out with customers through messaging, which they failed miserably at. It's unclear to me whether this failure was due to incompetence or because they were (or thought they were) restricted from providing certain information by law or contract.