I know it's just a meme, but when I see anti-Lobelia propaganda of any kind, it fills my veins with rage. Therefore I now spread the truth that Lobelia did nothing wrong, but that Bilbo framed her as a thief. Here is why:
Once upon a time, the hobbits lived peacefully in the Shire, never needing to leave their paradise, therefore never leaving it. However, one day Bilbo suddenly disappears with a wizard and some weird beard-dudes. Then he does not return.
Obviously, he is dead. So his family inherits his estate, among other things, and Lobelia moves into Bag-End.
Now Bilbo is returning from his adventure in the Hobbit. While vibing with Gollum, he had taken the ring of power, and now he comes back to his home. What he sees here horrifies him: His own home is being taken by Lobelia! This fills him with rage.
To understand matters fully, we must understand the power of the One Ring, as well as Bilbo's psychology. The power of the ring, as is clear in the LOTR books, lies in corrupting the mind. However, we can point to a specific type of corruption: possession. This is logical, as Saurons goal was to possess all of Middle-Earth. You can see this influence of the ring with Frodo becoming paranoid, being mad at Sam for taking the ring.
Now Bilbo. He never went outside the Shire, the only place he calls home. He is continuously among strangers and obviously longs for home. Now when he finally comes home, he sees that this home is taken from him. With the ring already corrupting him he cannot think clearly and therefore doesn't see how it is logical that others would think he is dead.
But the ring doesn't stop corrupting Bilbo's mind. He spins a fake tale to justify his possession of the ring and doesn't even trust his best friend Gandalf.
Now the question is: why would he only care about posessing the ring? The rings power can't solely lie in this, for then it would be useless to Sauron. The only logical conclusion is that he became more paranoid every day and started justifying himself in all his possessions.
Now to the point: Bilbo, paranoid as he was, tried to attack Lobelia in every way. She was a selfish person, always trying to get Bilbo's house and his furniture and what not. Most notably, he said that Lobelia took his spoons, without providing any evidence.
The only thing that we can really say about Lobelia personality is her conversation with Frodo and the second-to-last chapter. The conversation with Frodo does put her in a bad light, but we must remember that Frodo was heavily influenced, or rather indoctrinated, by Bilbo, so this can't be seen as an objective source. This means the only thing we know about Lobelia is that she was the most courageous of all Hobbits in fighting Saruman and his gang.
If you have mad it this far, I am sure you have been convinced of this truth, and if not, I invite you to give your arguments so that I can crush them.
Tl;dr: Lobelia was right