How to clean up your online reputation

Have a look at this:

Messy party photos, offensive tweets, pepper spraying student protesters ... sometimes, you just want a do-over when it comes to your online presence. And for a hefty price tag, you can.

Source - user link on phys.org

Though that might be worth a read.

I just use plenty of soap and water. It seems to do the trick.

Don't want bad stuff about you online? Don't post it in the first place. Lots of sites scrape up content from social networks and archive it forever, for all to see. The Internet Archive also take snapshots of most web sites.

Once it's out there, it's likely out there for good.