How to prevent extremely annoying codes in user input
<p>Is it possible to prevent characters that break the layout? Like this:</p>

<p>̤͎͍͖̳̙͚̭͕̠̤͎͍͖̳̙͚̭͕̠S̳͇͉̩̳
S̳͇͉̩̳
̤͎͍͖̳̙͚̭͕̠S̳͇͉̩̳̤͎͍͖̳̙͚̭͕̠S̳͇͉̩̳</p>

<p>̤͎͍͖̳̙͚̭͕̠̤͎͍͖̳̙͚̭͕̠S̳͇͉̩̳̤͎͍͖̳̙͚̭͕̠S̳͇͉̩̳̤͎͍͖̳̙͚̭͕
̠S̳͇͉̩̳</p>

<p>S̳͇͉̩̳̤͎͍͖̳̙͚̭͕̠S̳͇͉̩̳</p>
