Is it fair that the Cinco Ranch Association is controlling my actions around my home?

Well. I have a basketball goal in my front yard and it took me a while to get it up. I got everything set up and have sandbags in the back to you know hold it down. The Cinco Ranch Home Owner's Association said they wouldn't allow it and so we took them out. A big storm hit my area and the court collapsed and now most of the backboard and the rim is messed up. The goal cost me a lot of money so I decided to keep the thing stable by burying it under my front yard. The back part of the court that holds everything from the ground is buried leaving the pole and the backboard and the rim. Now the big back side is covered completely with dirt so I decided to plant some flowers on it to make it look nice. And then again the Cinco Ranch Association disapproves what I did. They said at first that it was against the rules for me to bury a basketball goal. And that planting things on it is also against the rules. So we have to go through this whole process of submitting a modification and planting flowers in the back. In two months I have not received word from them and then recently they have said and I quote that they DENIED my application to place a goal there and the reason why was and I quote

" Goal/Planting is not harmonious with house or neighborhood. It appears to be a portable goal stuck in the ground at an odd angle. It looks very out of place."

Now they want me to remove my basketball goal or modify it to bring my property into compliance with the guidelines they set and resubmit the changes I made to them. I apologize for my long story but here are my questions:

Is it fair that they (Cinco Ranch Association) can have a say in everything I do even though the home is owned by my family?

I have never signed or agreed to any guidelines they set to my home (community) so why do I have to follow them?

Is there any law in the state of Texas or the city of Katy or even the sub-community Cinco Ranch that forbids me from doing what I did?

Since they disapproved of what I did and the fact that I had no other choice to bury the goal since the instructions said to go with sandbags I had to follow it or else it would collapse (and it did). There was an alternative solution and it was to put water (anti-freeze) into the back part of the goal and since it collapsed it was no longer usable how am I supposed to keep the goal up?

My family works hard for the money we have and we are not buying a new basketball goal to solve the problem. I have also made some changes in the past that they also DENIED that have been approved in other homes around my community. Could it be the fact that since my family owns a larger home than others that we get more attention? Or the fact that we are Asian and we live in (not trying to racist here) a White majority place that they are racist towards us? (Though I highly doubt that)

Last question: If they take legal action against me (and they will) can I use Yahoo! Answers as a source of counter-arguments.

Thanks.