"the first 3 plugins work well and do remove the Timeline after the user logins to Facebook. There is no suspicious activity."
that the final conclusion is:
"In conclusion, we would like to warn all Facebook users to not try any Facebook Timeline Remover apps or plugins."
Why take issue with an unsuspicious app that works as advertised? It's a little unfair to the people who built these apps.
Aside from the general privacy concern presented by every single FB / smartphone app which has access to some level of your personal data, it seems like this is being too specific in its claim that "Timeline removal apps are scams."