I know from little things my Dad says to me that deep down he would prefer if I only wrote nice pleasant things on my blog but what he doesn't understand is how wonderful it is to have something that belongs to you and you alone.
Something that you can do anything you want with. Anything at all. As long as you don't hurt anybody in the process and do things like ask permission from a person if you are going to write about them on your blog. Then, when everything is all clear and above board you're free to say, do or write serious or fun things about whatever you want.
Like this for example