There's absolutely nothing wrong with re-using an expired domain. I'd even go as far as recommending it for hosting similar content to the previous owner's; in

There's absolutely nothing wrong with re-using an expired domain. I'd even go as far as recommending it for hosting similar content to the previous owner's; in the same concept as cafes closing and re-opening under new ownership. It's the site-squatters, domain-traders and link-farmers that shouldn't be allowed to take over existing URIs.