First name and email address is plenty to associate with an identity. They just need one other source for the email address that has your last name. Having a

First name and email address is plenty to associate with an identity. They just need one other source for the email address that has your last name. Having a whole network of companies know what you watch, when, the rating (if they have ratings), etc, is fairly intrusive in my view, but we all have our own threshold. When you give up control of your data, act accordingly. Given the scope of the disclosure, it is probably best to assume that any data you give this service will eventually be stolen (perhaps made public), resold (if possible, if not, watch for retroactive assignment of rights), requested by law, etc.. Basically, there's a not-insignificant probability that at some point, anyone who is interested will be able to see your activity or some portion of it.