[WiseWeasel]

Why wouldn't you want them? They seem harmless.

[olalonde]

Cockroaches are harmless as well... A lot of people instinctively find most insects repulsive. No rational argument is going to convince them otherwise.

[WiseWeasel]

Cockroaches inside your house are a sanitation issue, since they drop feces everywhere. Beyond that, they can knock themselves out.