The following items are considered harmful by various VTLUUG members and should be avoided:* TrendNET managed switches (e.g. TEG-240WS). These lack basic management features as well as SSH and telnet capabilities and are incompatible with modern browsers.* [[gp:Comcast|Comcast]]* [[gp:NTC|NTC]]* '''[[DyKnow]]'''* '''[[Respondus LockDown Browser]]'''* '''[[Tablet requirement]]'''* '''[[Duo 2FA]]. VTLUUG, while mostly strong supporters of 2-factor authentication, agrees Duo is a poor implementation'''* HTML email* [[gp:Web-CAT|Web-CAT]]* Hostnames that violate [https://tools.ietf.org/html/rfc1178 RFC 1178]* USB serial adapters with a Prolific chipset* Mastering Physics* [https://twitter.com/internetofshit Internet] of [http://vtcsec.org/projects/hacking_a_coffee_pot.html Things] [[Category:Recommended stuff]][[Category:Featured contentPending deletion]]