Logging in counts as an action like posting, so it triggers it.
Ahhhh well...are you sure that this is a good idea ?
I can understand the posts per seconds limit, but including the login doesn´t seem so usefull (keeping in mind that the sessions length can be selected).
Logging in is a "write" action to the database, just like posting in a thread or composing a PN. For the pause function as it is implemented these are virtually indistinguishable actions. While I imagine it would be possible to fine tune the pause function to ignore login events, the question is how much benefit would be produced in contrast to spending effort on this.