The ESTA application has an "Online Presence" optional field, where one can provide his identifiers for various websites (example: Facebook, Instagram,...).
As the field is optional, I decided to not fill it.
What are the pros and cons of filling the "Online Presence" field?
This website explains that
The point, of course, is to enhance national security as well as possible. In providing your social media information, US Customs and Border Protection Agents can see if you have any connections or ties to groups that could threaten the security of the country.
I guess there are more reasons to not fill it rather than filling it.
Are there any situation where it is a good idea to fill it?