How to read online advice without getting burned

A popular thread is a good place to start and a poor place to stop. Five habits that keep you safe.

A thread with thousands of votes feels authoritative. It is worth remembering what a vote measures: how many people liked a post, not whether it is right.

Check who is speaking

Anonymous posters can be experts, hobbyists or people repeating something they read yesterday. Look for specifics. Someone who gives model numbers, dates and what went wrong is usually more useful than someone who only gives a verdict.

Look for the disagreement

The most useful part of a discussion is often the reply that pushes back. If nobody disagrees, you may be reading a fan club.

Match the advice to your situation

• Prices, warranties and availability change by country.
• A product that suits a cold, dry climate may fail in tropical humidity.
• Advice written three years ago may describe a product that no longer exists.

Verify before you spend

For anything expensive, find a second independent source. For anything about health, law or money, treat a thread as a list of questions to ask a professional.

Keep the source

Save the link to the original discussion. If something goes wrong later, you will want to reread exactly what was said.