Thank you for contacting JustAnswer.
I am sorry to hear about the problems you are experiencing. It is not out of the ordinary for pre-teens and teens to test limits. Remember that any behavior that gets attention is likely to keep repeating. Therefore, yelling, lecturing, and getting upset all reinforce the negative behaviors that you don't want to see happening. Instead, when they break the rules you can calmly give one warning, then if the behaviors continue enforce the consequence immediately. This might mean calling the child's parent to pick them up, or taking the whole group to their respective homes. This means no discussion or yelling, just a one sentence statement of what they have done wrong. During each visit, simply repeat this process as many times as it takes for them to understand that their actions have consequence. Don't expect them to care about your feelings, but they will most likely care about the fun coming to an end with consequences. Remember though to be calm, or at least act calm, throughout this process.
In the meantime, make sure that you catch them when they are behaving the way you want them to and give praise, perhaps an extra privilege and attention. The more you are consistent with this method the more you will build credibility and the boys will begin to realize that the rules must be followed and that you must be respected. I hope this answer is helpful. Please let me know if I can clarify further.
Thank you for your thoughtful answer. However, when I didn't get a reply by the time I went to bed (I waited about an hour or two,) I decided to seek personal counseling on this matter. I really didn't want to pay for advice, and I don't have extra money for things, especially when I can obtain a personal counselor on my insurance with no pay required. Hopefully Just Answer has not already billed my credit card; I clicked on off like the system instructed.