I have to agree. When Ted Nugent made a threat against President Obama a few years back, he was paid a visit by the secret service. I see no reason why Madonna should be given a free pass.
Interestingly enough, while alt press is going apeshit about the the secret service investigating Madonna, MSM is being quite silent.
Should the Secret Service pursue investigation, I don't think they'll press charges, but it is their job to investigate any threat against the president.