&gt; Stripping out LTR and RTL override might be reasonable because they&#x27;re frequently abused to screw up website layouts.<p>As long as Twitter allows Zalgo it isn&#x27;t that concerned about website layouts.<p>(Zalgo: Rampant abuse of stacking combining diacritical marks above and below the line. It can get really, really... uh... <i>impressive</i>, in a Lovecraftian typewriter art kind of way.)