Tony - I am confused by your post. On one had you are stating people working in the world of social media should practice what we preach and engage. However, on the other you are specifically explaining how you plan to raise your Klout score by simply sending single thank you tweets to your followers.
I don't want to be negative. However, I would not recommend to my clients, colleagues or students to conduct social media in such a way. This post reads as if you are focused purely on the #'s. I am surprised you wrote off Manal's concern so easily? One in 30 is actually a lot of potentially good followers to lose if you're trading such based on a string of thank you's to raise a Klout score? I would be more concerned w/the response of Manal than I would on raising your score.
I question what your objectives are in social media. WHY do you want the Klout score to go up? Are you getting opt-ins to your newsletter? Are people visiting your site? Is your bounce rate decreasing? Are they engaging with you and your brand. Are you nurturing them to better meet your business goals?
Sounds like the reason your score jumped in the first place was you provided good content. That I get and I like. However, your approach to now get another jump based upon cluttering your tweet stream with thank you's and asking them to follow seems very self serving. I don't think you need to tell people to follow you back. Most of them probably know how and will if they find you interesting enough.
What if you took the same time you are spending writing the single thank you retweets and instead wrote a few tweets with names grouped together? Then you could spend the rest of the time actually writing another blog article that could provide value to your audience. And yes, maybe it could raise your score again? However, wouldn't it be better if they engaged with you and your brand?
If it was me I would set different goals. If you focus on providing value to your audience your scores will go up by default. Even if they don't who cares? If you are providing value then you will be building and connecting with your community in an authentic way. Chances are by default this will bring value to you both personally and professionally and much more so than a string of RTs. I checked out your tweet stream and it leaves little to be interested in w/all the thank you's.
I would be careful how you are viewing and measuring "influence." You would be more "influential" if a mass of people again retweeted your content vs simply reply to a thank you for retweeting me tweet?
My 2 cents, take it or leave it ;)