Profitable bitcoin mining is all ASICs in places with favorable energy costs.  Regular computers in schools are not going to make any profit.<p>Here&#x27;s a story about a man who installed SETI@Home on a bunch of school computers without getting correct permission.<p>The extra electricity bill caused some consternation.<p><a href="http:&#x2F;&#x2F;www.securityfocus.com&#x2F;news&#x2F;300" rel="nofollow">http:&#x2F;&#x2F;www.securityfocus.com&#x2F;news&#x2F;300</a><p>And here&#x27;s someone who lost their job because of it: <a href="https:&#x2F;&#x2F;www.techdirt.com&#x2F;articles&#x2F;20041010&#x2F;2225204.shtml" rel="nofollow">https:&#x2F;&#x2F;www.techdirt.com&#x2F;articles&#x2F;20041010&#x2F;2225204.shtml</a>