I think this calendar trick will not reflect well on you. You identified a problem, not getting enough work done due to an excessive amount of meetings you have to attend, but did not really anything to solve it.
You just added all meeting-hours in your calendar to use as an excuse in case you don't get enough work done or in the hope that the meeting-organizers will see those totals and think twice about inviting you to another meeting (prediction they probably won't notice). I think it just shows lack of initiative.
I think you should do a combination of the following things.
- just don't go to some meetings which seem obviously unimportant to you.
- when someone invites you to a meeting ask him/her if it's really necessary you attend it.
- ask your manager if he/she can do something about the excessive amount of meetings you are invited to.
- If on a meeting all points relevant to you have been discussed but it still drags on and on, ask if you can leave.