The bigger worry, of course, is that CE is just the first step. I trimmed my CE stock holdings down to 5 tickers I felt were worth holding through the illiquidity.
I hold 18-20 "stop sign" stocks, including a couple that are very big positions (for me). If Schwab were to restrict "stop sign" stocks like they have the CE stocks that would hit me hard.
Several of my "stop sign" stocks are DL shells.
If I could afford to buy all of them, I would not need to buy any of them and I sure wouldn't be spending time on the message boards!